On Wed, Oct 18, 2023 at 09:27:02PM +0100, Joao Martins wrote: > Throughout IOMMU domain lifetime that wants to use dirty tracking, some > guarantees are needed such that any device attached to the iommu_domain > supports dirty tracking. > > The idea is to handle a case where IOMMU in the system are assymetric > feature-wise and thus the capability may not be supported for all devices. > The enforcement is done by adding a flag into HWPT_ALLOC namely: > > IOMMUFD_HWPT_ALLOC_ENFORCE_DIRTY Actually, can we change this name? IOMMUFD_HWPT_ALLOC_DIRTY_TRACKING ? There isnt' really anything 'enforce' here, it just creates a domain that will always allow the eventual IOMMU_DIRTY_TRACKING_ENABLE no matter what it is attached to. That is the same as the other domain flags like NEST_PARENT Jason
